A student says carbonates give hydrogen gas with acids. What is the correct correction?
Answer and explanation
Correct answer: Carbonates give carbon dioxide with acids
The governing reaction is acid–carbonate reaction: acid + carbonate produces a salt, water, and carbon dioxide. For example, sodium carbonate with hydrochloric acid gives sodium chloride, water, and CO₂. Hydrogen is associated with the reaction of suitable active metals with acids, not carbonates. Carbon dioxide can be confirmed because it turns limewater milky, so option A is correct.
Frequently asked questions
What is the correct answer to this question?
Carbonates give carbon dioxide with acids
Why is this the correct answer?
The governing reaction is acid–carbonate reaction: acid + carbonate produces a salt, water, and carbon dioxide. For example, sodium carbonate with hydrochloric acid gives sodium chloride, water, and CO₂. Hydrogen is associated with the reaction of suitable active metals with acids, not carbonates. Carbon dioxide can be confirmed because it turns limewater milky, so option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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